I am a believer In the idea that if you’re good at one thing, your path to success largely relies on your being in the top 1% at that thing, but if you’re good at TWO things, you can find success by being top 25% at both. Some of this is math (your exact combination is going to have some rarity), but the bigger art is the assumption that you can find and leverages the synergies between the two things.
It’s not an argument for generalization so much as one for diversification.